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What is the difference between a QMB364 and QMB364W?

Issue:
Product Design

Product Line:
QMB Switches

Cause:
Product Design Features

Resolution:
The QMB364 is an obsolete, Series D2 design, fusible switch for use in QMB panelboards and switchboards. The QMB364W is electrically equivalent, but of our current Series E1 design. They are not interchangeable.